6640318933266 has 16 divisors (see below), whose sum is σ = 13281045601824. Its totient is φ = 2213371688544.

The previous prime is 6640318933247. The next prime is 6640318933361. The reversal of 6640318933266 is 6623398130466.

It is a super-2 number, since 2×6640318933266² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16777051 + ... + 17168286.

It is an arithmetic number, because the mean of its divisors is an integer number (830065350114).

Almost surely, 2^{6640318933266} is an apocalyptic number.

6640318933266 is an abundant number, since it is smaller than the sum of its proper divisors (6640726668558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6640318933266 is a wasteful number, since it uses less digits than its factorization.

6640318933266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33977945.

The product of its (nonzero) digits is 20155392, while the sum is 57.

The spelling of 6640318933266 in words is "six trillion, six hundred forty billion, three hundred eighteen million, nine hundred thirty-three thousand, two hundred sixty-six".